Charles r



ci R. HARTMAN.

Subsoil Plow.

Patented April 14, 1868.

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N, PETERS. Phmvmlwgnphn. wuhingxon. DC.

@Mish .tetra atrnt @ffice Letters Patent No.` 76,627,'dated April A14, 1868.

IMPROVEMENT `IN. SUBSOIL-PLOUGH.

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TO ALL WHOMIT MAY CONCERN: y

Be' it .known that I, CHARLES R. HAETMAN, of Vincennes, in the county of Knox, and State lof Indiana, have invented a new andimproved Subsoil-Attachment for P loughs; -and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in whieh- Figure 1 is a'perspective view of the improved subsoilfdevice.

Figure 2 is aside view of the same.

Figure 3 is a top View, and

Figure 4 is a horizontal section through the coulter, taken at the point indicated by red line ,fe in fig. 2.

Similar letters of'reference indicate corresponding parts in the several figures.

l This invention-relates to a new and improved implement, which is adapted for being secured to a commonv plough-beam, 'in rear-of a turn-plough,and which is designed for running in the furrow made by the plough,

and throwing up and loosening the snbsoil. j

- The nature of my invention consistsin a vertically and longitudinally-adjustable coulter, having its lower portion sharpened and vbent forward of thelincgof its upper portion or standard, and otherwise so constructed as not to be readily impeded'in its passage through'thesoil by roots and other obstructions, said coulterbeing provided with a concave-convex and triangular shovel, which is secured to anextension formed on its heel in such mannerl as not to 'prevent the free passage of the s hovel through the soil, nor' to oder obstructing projec- 4tions which would prevent the earth from scouring lthe shoveland keeping its surface smooth, all as will be hereinafter explained.. l

y To enable others skilled in they art to understand my'invention, I-will describe its construction and operation.

In the accompanying drawings, A represents a portion of'acommon'plough-beam, to one side of which the coulter and its standard are applied, by means of a guide-box, B, from which project two wings a al, oneof which is secured to the beam A by means of a pivot-pin, a2, and the other wing is secured by means of a bolt, a3, which passes transversely through a slot, b, made through this wing.

This slot is concentric to the pin a2, sethat, when the holta3 is loosened, the coulter and its standard can be adjusted longitudinally in the are of a circle, and-set to run at any'dcsired pitch or inclination with respect to the plough-beam.

The coulter or cutter C is formed on a standard, C', and bent forward at an obtuse aiigle, as shown in'gs. 1 and 2, so asto make a draw or shearcut, and allow roots and other objects which it does not cutthrough to slide upward, and thus escape without offering any seriousobstruct-ion. The point ofthe coulter C is rounded, as shown at c, for allowing roots and othelr objects which are too deeply seated in the soil to pass upward, to escape beneath the lower end of the coulter. The lieel of this coulteris cxtcndedbackward, and tapered as shown at d, and this rear extension is arranged slightly above the sole of .the coulter, so as to leave an abutment or shoulder et e, against which the point ofthe shovel D abuts, and is confined in place by means of bolts ff, as shown in figs. 1 and 2.' -The boltsf are inserted from the bottom side 'of the shovel D, through this shovel and the coulter-extension, d,and they receive the nuts on their upper ends. "The heads of the nuts being counter- 'sunk into the sole of the shovel, and the nuts being located ,directly in rear of the coulter C, it will be seen that there will be no projection offered which would obstruct the free passage of the shovel through the earth, confrequentlyy the upper and lower surfaces of the 'shovel willl be scoured and kept perfectly smooth by the earth The shovel D is a triangular plate, with' a convexnpper surface and a concave sole. Its front pointed end abuts snugly against the shoulder e, and its converging edges are sharpened. V lhe point of this shovel is arranged slightly above the peint ofthe coulter, so that, while this coulter will' pass freely through the subsoil, and loosen it, the sharp edge of the inclined coulter C will cut ormove outof the way any and all roots and other objects which might breaker otherwise injure the thin blade or shovel D. The standard portion C of the coulter C is made lrectangular in cross-section, and/passed through its adjustable guide-box, B, upon the plough-beaux A, where it is held in position by means of'the split bolt and spring-key g. Several holes being made through tho "standard C, they will allow this standard and its coulter to be adjusted vertically, and secured at any desired point, according to the depth it is desired to run the shovel. Below the guide-box B, and pivotd to the standard C', at its junction with the coulter C, 'isa hook, Gr, which y may be provided with one 1ormore holes through its shank, for' setting it forward or backward, ,as occasion requires. This hook G is designed to aord' anvattaehment for a short chain, not shown in the drawings, which, in practice; will be attached to the share of a plough, for the purpose `of resisting backward ,strain 'upon thesubsoiler. The chain'wrill be shortened or lengthened, according to the pitch given to the standard and coulter. `Instead-of using a key-bolt,g, to secure the standard C tothe guide-box B, a. clamp-screw (thumb-screw) inay be used in its stead, in which'case tliestandard should have notches Ymade intits front edge, to receive a' toothcast upon'the inside of thesaid guide-box. The screw will be tapped through the back of the box B, so as to abut against the rear edge of the standard. v i I Having described my invention, what I claim as new, and desire to secure lby Letters Patent, is

1. 'The'concavo-convex and triangular shovel D, secured to an extended heel-piece, cl, ofthe coulter C, and abutting against thc shoulder e' of said Coulter, substantially as described. V

2. The construction ofthe coulter C upon the standard C', so that the upper portion ofthe cutting-edge=of `this Coulter shall form un obtuse angle with the front edge of the standard C, in combination with the shovel D,

applied substantially as described. 4

CHARLES R. HARTMAN.

Witnesses: i

-Itnumzr S. GAUTuonN,

Acorn-LA P-WooDALn 

